Software developed by a small but growing number of companies aims to spot potential medical problems before they require hospitalization. The software was created for use by non-medical workers. Thomas Scully, the former top administrator at the Centers for Medicare & Medicaid Services and now an attorney in a private investment firm, said the idea is good. But, he added, their growth potential may be limited because the expense of the tablets and software will make home care services more expensive. "All of this is part of the answer, but it has to show economic savings," said Scully.